(19)

(11)

EP 1 946 178 A2

(12)

(43) Date of publication: 23.07.2008 Bulletin 2008/30 (21) Application number: 06851805.9 (22) Date of filing: 31.10.2006

(51) International Patent Classification (IPC):  G02B 26/08(2006.01) (86) International application number: PCT/US2006/060399 (87) International publication number: WO 2008/054424 (08.05.2008 Gazette 2008/19)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR Designated Extension States: AL BA HR MK RS (30) Priority: 31.10.2005 US 263795 (71) Applicant: Advanced NuMicro Systems, Inc. San Jose, CA 95129 (US)	(72) Inventor: FU, Yee-chung Fremont, CA 94539 (US) (74) Representative: Pingree, Oliver Norman et al Williams Powell Staple Court 11 Staple Inn Buildings London, WC1V 7QH London, WC1V 7QH (GB)